In Newton’s mechanical view of the cosmos, the universe is thought of in terms of particles whose behavior can be known and predicted at any moment in time. It’s like balls on a pool table: If we have the information that describes the force of a ball as it strikes another (speed, angle, and so on), then we should be able to predict where and how the one that has been struck will travel. And if it should hit other balls in its journey, we’ll know where and how fast they’re traveling as well. The key here is that the mechanical view of the universe sees the smallest units of the stuff our world is made of as things.